WarrantyWe guarantee the instrument described for 3 years from the date of
The use of advanced technology and the high quality standard of our
instruments are the result of continuous development. This may result
in differences between this operating manual and your instrument.
Also, we cannot guarantee that there are absolutely no errors in this
manual. Therefore, we are sure you will understand that we cannot
accept any legal claims resulting from the data, figures or descriptions.
purchase.
The instrument warranty covers manufacturing faults that are
discovered within the warranty period.
The warranty does not cover components that are replaced during
maintenance work, e. g. batteries.
The warranty claim extends to restoring the instrument to readiness for
use but not, however, to any further claim for damages. Improper
handling or unauthorized opening of the instrument invalidates any
warranty claim.
To ascertain the warranty liability, return the instrument and proof of
purchase together with the date of purchase freight paid or prepaid.
CE conformity
Radio data transmission
Copyright
SI Analytics GmbH hereby declares that the Lab 970 meter is in
compliance with the essential requirements and the other relevant
provisions of Directive 1999/5/EC.
The EC declaration of conformity can be requested from SI Analytics
GmbH.
The Lab 970 compact precision conductivity meter enables you to
perform conductivity measurements quickly and reliably. The Lab 970
provides the maximum degree of operating comfort, reliability and
measuring certainty for all applications.
The proven procedures for determining or adjusting the cell constant
support your work with the conductivity meter.
1Keypad
2Display
3Socket field
Note
The meter is also available as part of an individual Set of equipment.
You will find information on this and other accessories in the SI
Analytics GmbH laboratory catalog or via the Internet.
ba75558e0311/2009
7
OverviewLab 970
MODESC
CAL
MODE
CAL
SC
1.1Keypad
In this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) generally indicates a short keystroke
(under 2 sec) in this operating manual. A long keystroke (approx.
2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK
_>).
<On/Off>:
<On/Off
<MODE>:
<MODE
<CAL>:
<CAL
<SC>:
<SC
<▲>: Increment values, scroll
_>:
_>:
_>:
_>:
Switch the meter on/off
Resetting the determined cell constant
Select measured parameter
Open setting menu for calibration and
measurement
Call up calibration procedure
Call up calibration data
Activate / deactivate stability control
Set the interval for data transmission
8
<▼>: Decrement values, scroll
<OK>:
_>:
<OK
Confirm entries
Open setting menu for system settings
ba75558e0311/2009
Lab 970Overview
Time
Day.Month
Year
Baud
No.
Ident
1/cm
/K
%
8
88
8
8
8
8
8
°F
C
°
TDS
Sal
S/cm
mg/l
MW*cm
m
µ
LoBat
Tref25
Tref20
Auto
Store
ARng
Cal
RCL
nLF
Lin
AR
TP
-
Measured variable
ID sensor symbol
Measured value display
Temperature display, function display
indicators, status display indicators
1.2Display
Temperature display,
function display
indicators, status
display indicators
[AR]Stability control is active
[ARng]Automatic range switch-over: meter measures with
highest possible resolution
[Cal]Calibration
[Lin]Linear temperature compensation
[LoBat]With battery operation: Batteries almost empty
[nLF]Nonlinear temperature compensation
[TP]Temperature measurement active
[Tref20]Reference temperature 20 °C
[Tref25]Reference temperature of 25 °C
ba75558e0311/2009
9
OverviewLab 970
1.3Socket field
Connectors:
1Conductivity measuring cell
2Temperature sensor
3
4USB interface
5Power pack
6RS 232 interface
CAUTION
Only connect sensors to the meter that cannot return any voltages
or currents that are not allowed (> SELV and > current circuit with
current limiting).
Almost all measuring cells - in particular SI Analytics GmbH
measuring cells - fulfill these conditions.
10
ba75558e0311/2009
Lab 970Overview
1.4Automatic sensor recognition
The automatic sensor recognition function enables
z operation of a sensor with different meters without recalibration
z operation of different sensors with a meter without recalibration
z to assign measurement data to a sensor
– measurement datasets are always downloaded to the interface
along with the sensor type and sensor series number
z to assign calibration data to a sensor
– calibration data is always downloaded to the interface along with
the sensor type and sensor series number
z automatic activation of cell constants with conductivity sensors
To be able to use the automatic sensor recognition function, you need
a meter that supports the automatic sensor recognition (e.g. Lab 970)
and a sensor (ID sensor) that is suitable for sensor recognition.
In ID sensors, sensor data is stored that clearly identifies the sensor.
The sensor data is automatically transmitted to the meter by radio and
used for sensor identification there.
Note
You can also operate non-ID sensors with the Lab 970 meter. In this
case, however, you will not be able to use the advantages of the sensor
recognition function.
ba75558e0311/2009
11
OverviewLab 970
ID sensor symbol
%
°F
/K
S/cm
m
µ
Tref20
Auto
Store
MW*cm
Time
Day.Month
Year
Baud
No.
Ident
ARng
Cal
RCL
Lin
AR
LoBat
1/cm
8
mg/l
8-
0
5
2
8
3
5
Tref25
nLF
TP
°
C
ID sensorsSI Analytics GmbH ID sensors support the automatic sensor
recognition. "ID" is added to the designation of these sensors, e.g.
electrode LF913T ID.
Note
Information on available ID sensors is given on the Internet or directly
by SI Analytics.
ID sensors connected to the Lab 970 meter are identified by the ID
sensor symbol on the display of the meter.
12
Sensor data from
ID sensors
ID sensors transmit the following sensor data
z Sensor type
z Sensor series number
z Calibration data
– Calibration date
– Calibration characteristics
– Calibration interval
The calibration data is updated in the ID sensor after each calibration
procedure. The ID sensor symbol flashes while this is being done.
Note
The sensor must not be disconnected while the ID sensor symbol is
flashing, as otherwise the calibration data will not be completely
transmitted. The sensor will then have no valid calibration.
Note
If non-ID sensors are used, the calibration data is read out by the meter
and stored in the meter.
ba75558e0311/2009
Lab 970Safety
2Safety
This operating manual contains basic instructions that you must follow
during the commissioning, operation and maintenance of the meter.
Consequently, all responsible personnel must read this operating
manual before working with the meter.
The operating manual must always be available within the vicinity of the
instrument.
Target groupThe meter was developed for work in the laboratory.
Thus, we assume that, as a result of their professional training and
experience, the operators will know the necessary safety precautions
to take when handling chemicals.
Safety instructionsSafety instructions in this operating manual are indicated by the
warning symbol (triangle) in the left column. The signal word (e.g.
"Caution") indicates the level of danger:
Further notes
WARNING
indicates instructions that must be followed precisely in order to
avoid possibly great dangers to personnel.
CAUTION
indicates instructions that must be followed precisely in order to
avoid the possibility of slight injuries or damage to the instrument
or the environment.
Note
indicates notes that draw your attention to special features.
Note
indicates cross-references to other documents, e.g. operating
manuals.
ba75558e0311/2009
13
SafetyLab 970
2.1Authorized use
Authorized use of the meter consists exclusively of the measurement
of conductivity, temperature, salinity and TDS (total dissolved solids) in
a laboratory.
The technical specifications as given in chapter 7 T
ECHNICALDATA
(page 57) must be observed. Only the operation and running of the
meter according to the instructions given in this operating manual is
authorized.
Any other use is considered unauthorized.
2.2General safety instructions
This instrument is constructed and tested in compliance with the IEC
1010 safety regulations for electronic measuring instruments.
It left the factory in a safe and secure technical condition.
Function and
operational safety
The smooth functioning and operational safety of the meter can only be
guaranteed if the generally applicable safety measures and the specific
safety instructions in this operating manual are followed during
operation.
The smooth functioning and operational safety of the meter can only be
guaranteed under the environmental conditions that are specified in
chapter 7 T
ECHNICALDATA (page 57).
If the instrument was transported from a cold environment to a warm
environment, the formation of condensate can lead to the faulty
functioning of the instrument. In this event, wait until the temperature of
the instrument reaches room temperature before putting the instrument
back into operation.
CAUTION
The meter is only allowed to be opened by personnel authorized
by SI Analytics GmbH.
14
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Lab 970Safety
Safe operationIf safe operation is no longer possible, the instrument must be taken out
of service and secured against inadvertent operation!
Safe operation is no longer possible if the meter:
z has been damaged in transport
z has been stored under adverse conditions for a lengthy period of
time
z is visibly damaged
z no longer operates as described in this manual.
If you are in any doubt, please contact the supplier of the meter.
Obligations of the
purchaser
The purchaser of this meter must ensure that the following laws and
guidelines are observed when using dangerous substances:
z EEC directives for protective labor legislation
z National protective labor legislation
z Safety regulations
z Safety datasheets of the chemical manufacturers.
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15
SafetyLab 970
16
ba75558e0311/2009
Lab 970Commissioning
3Commissioning
3.1Scope of delivery
z Lab 970 laboratory meter
z Power pack
z 4 batteries 1.5 V Mignon type AA
z Z875 USB cable with A plug on B plug
z Transparent cover
z Operating manual
z CD-ROM with USB driver
3.2Initial commissioning
Insert batteries
Perform the following activities:
z Insert batteries
z Switch on the meter
z Set the date and time
z Connect the power pack (for line power operation only).
1Open the battery compartment (1) on the underside of the
meter.
2Place four batteries (type Mignon AA) in the battery
compartment.
3Close the battery compartment (1).
The date (day) flashes in the display.
4Set the date and time according to page 42.
ba75558e0311/2009
17
CommissioningLab 970
CAUTION
Make sure that the poles of the batteries are the right way round.
The
±signs on the batteries must correspond to the ± signs in the
battery compartment.
Only use leakproof alkaline manganese batteries.
Switching on the meter
Setting the date and
time
Connecting the power
pack
1Switch on the meter with <On/Off>.
A display test is briefly displayed.
2See page 44
You can either operate the measuring instrument with batteries or with
the plug-in power supply. The plug-in power supply supplies the measuring instrument with low voltage (12 VDC). This saves the batteries.
CAUTION
The line voltage at the operating site must lie within the input
voltage range of the original power pack (see page 57).
CAUTION
Use original power packs only (see page 57).
3Insert the plug into the socket of the conductivity meter.
4Connect the original power pack to an easily accessible power
outlet.
18
Note
You can carry out measurements without the power pack.
ba75558e0311/2009
Lab 970Operation
4Operation
4.1Switching on the meter
1Place the meter on a flat surface and protect it from intense
light and heat.
2Press the <On/Off>
A display test is briefly displayed.
Subsequently, the meter switches to the measuring mode
(measured value display).
Note
The meter has an energy saving feature to avoid unnecessary battery
depletion during battery operation.
The energy saving feature switches off the meter if no key was pressed
during the specified interval (setting the switch-off interval see
page 44).
The energy saving feature is not active:
z if the meter is supplied via the power pack or the USB interface
z automatic storingif the printer cable is connected (for external
printers).
key.
ba75558e0311/2009
19
OperationLab 970
4.2General operating principles
This section contains basic information of the operation of the Lab 970.
4.2.1Operating modes
The instrument has the following operating modes:
z Measuring
The display indicates the measurement data in the measured value
display
z Calibration
The display guides you thru a calibration procedure with calibration
information
z Transmitting data
The meter transmits measuring data and calibration records to a
serial interface automatically or manually.
z Configuration
The system menu or a sensor menu with submenus, settings and
functions is displayed
4.2.2Operation
KeysThe meter is operated via keys. The keys can have different functions
with long or short keystrokes.
FunctionsGenerally, with a short keystroke a function is carried out. A long
keystroke opens a setting menu.
In a setting menu, settings are selected with the <▲><▼> keys.
A setting is confirmed with <OK>. With confirming, the setting is
finished and the next setting is displayed.
RepresentationIn this operating manual, keys are indicated by brackets <..> .
The key symbol (e.g. <OK>) generally indicates a short keystroke
(under 2 sec) in this operating manual. A long keystroke (approx.
2 sec) is indicated by the underscore behind the key symbol (e.g.
<OK
_>).
20
ba75558e0311/2009
Lab 970Operation
4.3Measuring
Preparatory activitiesPerform the following preparatory activities when you want to measure:
1Connect a measuring cell to the meter.
2Adjust the temperature of the test solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
3Calibrate or check the meter with the measuring cell.
4Select the measured parameter with <MODE>.
CAUTION
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
The RS232 and USB interfaces are not galvanically isolated.
Temperature sensorThe temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is
connected, it is indicated on the display by TP.
If you use a conductivity measuring cell without integrated temperature
sensor, we recommend to use an external temperature sensor.
Note
The conductivity meter automatically recognizes the type of the
temperature sensor used. Therefore, you can connect measuring cells
with an NTC30 or Pt1000.
ba75558e0311/2009
21
OperationLab 970
0
5
2
0
3
5
C
°
S/cm
µ
nLF
TP
Tref25
4.3.1Measuring the conductivity
1Perform the preparatory activities according to page 21.
2Immerse the conductivity measuring cell in the test sample.
3If necessary, scroll with <MODE> until the measured
parameter
4Wait for a stable measured value.
ӕ with the unit mS/cm or µS/cm is displayed.
5Measurement with stability control (see page 25).
4.3.2Measuring the resistivity
1Perform the preparatory activities according to page 21.
2Immerse the conductivity measuring cell in the test sample.
3If necessary, scroll with <MODE> until the measured
parameter
4Wait for a stable measured value.
ӕ with the unit MOhm is displayed.
22
ba75558e0311/2009
Lab 970Operation
2
1
2
3
2
3
C
°
Sal
nLF
TP
5Measurement with stability control (see page 25).
4.3.3Measuring the salinity
1Perform the preparatory activities according to page 21.
2Immerse the conductivity measuring cell in the test sample.
3Using <MODE>, scroll as necessary until the measured
parameter Sal is displayed.
4Wait for a stable measured value.
ba75558e0311/2009
5Measurement with stability control (see page 25).
23
OperationLab 970
0
0
1
3
5
3
TDS
mg/l
Tref25
nLF
7
8
0
3
1
3
TDS
mg/l
Tref25
nLF
4.3.4Measuring the total dissolved solids (TDS)
1Perform the preparatory activities according to page 21.
2Immerse the conductivity measuring cell in the test sample.
3Using <MODE>, scroll as necessary until the measured
parameter TDS is displayed.
4Using <▲><▼>, set the TDS factor (0.40 ... 1.00).
5Wait for a stable measured value.
6Measurement with stability control (see page 25).
24
ba75558e0311/2009
Lab 970Operation
4.3.5Measuring with stability control
The stability control function (SC) checks the stability of the
measurement signal. The stability has a considerable effect on the
reproducibility of the measured value.
1With <SC>, activate the stability control function.
The AR function display indicator appears.
The current measured value is frozen (hold function).
2Start measurement with stability control with <OK>.
An AutoRead measurement is carried out to control the stability
of the measured value. The AR display indicator flashes until a
stable value is measured. The calibration process is finished
when AR stops flashing.
This measured value is downloaded to the interface.
3If necessary, start the next measurement with stability control
with <OK>.
4Press <MODE> or <SC>
to terminate the stability control.
Note
The current measurement with stability control can be terminated at
any time (accepting the current value) by pressing <OK>.
ba75558e0311/2009
25
OperationLab 970
L
CL
E
L
A
C
4.4Determining/setting up the cell constant [C]
Why determine/set up
the cell constant?
Cleaning interval (Int.C)When the specified cleaning interval (Int.C) has expired, the Cln display
Due to aging, the cell constant slightly changes. As a result, an inexact
measured value is displayed. Calibration determines the current value
of the cell constant and stores this value in the instrument.
Thus, you should calibrate at regular intervals.
For non-ID sensors, the calibration data is stored in the meter. For ID
sensors, the calibration data is stored in the sensor.
You can determine the cell constant of the conductivity measuring cell
in the ranges 0.450 ... 0.500 cm
1.200 cm
manually in the range 0.250 ... 2.500 cm
Besides, the fixed cell constant 0.010 cm
indicator appears after the meter has been switched on and reminds
you to clean the measuring cell. It is still possible to measure.
The cleaning interval (Int.C) is set to 180 days (d180) in the factory. You
can change the interval (see page 46).
Note
In order to maintain the high measurement accuracy of the measuring
system, clean the measuring cell and recalibrate after the cleaning
interval has expired.
-1
by calibrating in the 0.01 mol/l KCl control standard or set it
-1
, 0.585 ... 0.715 cm-1 or 0.800 ...
-1
or 0.090 ... 0.110 cm-1.
-1
can be selected.
Determining the cell
(calibration in control
26
constant
standard)
4.4.1Determining the cell constant (calibration)
1Press <CAL> repeatedly until CAL CELL is displayed.
ba75558e0311/2009
Lab 970Operation
2Press <OK> or <CAL_> to confirm the selection of CAL
CELL.
3Immerse the measuring cell in the control standard solution,
0.01 mol/l KCI.
4Start the calibration with <OK>.
The determination of the cell constant with stability control
starts.
The display indicator flashes until there is a stable signal.
The determined cell constant is displayed for 10 seconds. The
meter stores the cell constant automatically.
After this the meter switches to the measuring mode.
Stability controlDuring calibration, the stability control is automatically activated.
ba75558e0311/2009
Note
If the error message E3 appears, refer to
(
PAGE 55).
CHAPTER 6 WHATTODOIF...
Note
This method of automatically determining the cell constant by
calibration in the 0.01 mol/l KCL control standard can only be used for
measuring cells with cell constants in the ranges
0.450 ... 0.500 cm
-1
, 0.585 ... 0.715 cm-1 or 0.800 ... 1.200 cm-1.
27
OperationLab 970
16.09.2005 08:53:54
Lab 970 02320025
CALIBRATION COND
Cal Time : 16.09.2005 08:22:14
Cal Interval: 180d
Cal Std.: 0.01 mol/l KCL
Calibration evaluationAfter the calibration, the meter automatically evaluates the current
status. The evaluation appears on the display.
Display Cell constant [cm
Status display indicator CAL.
in the range
0.450 ... 0.500 cm
You are working with a
correctly calibrated measuring
0.585 ... 0.715 cm
0.800 ... 1.200 cm
-1
]
-1
-1
-1
cell.
outside the ranges
E3
Eliminate the error according to
CHAPTER 6 WHATTODOIF...
(
PAGE 55).
0.450 ... 0.500 cm
0.585 ... 0.715 cm
or
0.800 ... 1.200 cm
-1
-1
-1
Calibration recordWhen finishing a calibration, the new calibration values are stored.
For ID sensors, the calibration data is stored in the sensor (see
page 11)
Note
The calibration record is automatically transmitted to the interface after
calibrating.
Sample record:
If an ID sensor is used, the calibration record additionally names the
sensor type and sensor series number (see page 11).
Downloading calibration
data
You can download the calibration data:
z to the display (see page 38)
z to the interface (see page 40)
28
ba75558e0311/2009
Lab 970Operation
L
CL
E
4.4.2Using the last calibrated cell constant
1Press <CAL> repeatedly until CELL is displayed.
2Press <OK> or <CAL_> to confirm the selection of CELL.
3If necessary, press <CAL> repeatedly until CAL and the last
calibrated cell constant is displayed.
4Confirm the selection with <OK>.
The displayed cell constant is used.
The meter switches to the measured value display.
ba75558e0311/2009
29
OperationLab 970
L
CL
E
4.4.3Setting the cell constant manually
Note
The cell constant to be set must either be taken from the operating
manual of the measuring cell or is printed on the measuring cell.
Range
0.250 ... 2.500 cm
-1
1Press <CAL> repeatedly until CELL is displayed.
2Confirm the selection with <OK> or <CAL_>.
The cell constant that was set last is displayed.
3Press <CAL> repeatedly until a cell constant in the range 0.250
... 2.500 cm
-1
is displayed.
30
4Set the cell constant to be used with <▲><▼>, e.g.
0.614 cm
-1
.
ba75558e0311/2009
Lab 970Operation
1/cm
4
01
6
0
8
6
S/cm
µ
Tref25
ARng
nLF
L
CL
E
5Confirm the selection with <OK>.
The new cell constant is used from now on.
The meter switches to the measured value display.
Range
0.090 ... 0.110 cm
-1
1Press the <CAL> key repeatedly until CELL is displayed.
2Confirm the selection with <OK> or <CAL_>.
3Press <CAL> repeatedly until a cell constant in the range 0.090
... 0.110 cm
-1
is displayed.
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31
OperationLab 970
1/cm
0
00
1
8
1
2
S/cm
µ
Tref25
ARng
nLF
1/cm
5
00
1
1
7
2
S/cm
µ
Tref25
ARng
nLF
L
CL
E
Selecting the cell
constant
0.010 cm
4Set the cell constant to be used with <▲><▼>, e.g.
0.105 cm
5Confirm the selection with <OK>.
The new cell constant is used from now on.
The meter switches to the measured value display.
1Press the <CAL> key repeatedly until CELL is displayed.
-1
-1
.
32
ba75558e0311/2009
Lab 970Operation
1/cm
0
01
0
5
2
9
S/cm
µ
Tref25
ARng
nLF
2Confirm the selection with <OK> or <CAL_>.
-1
3Press <CAL> repeatedly until the cell constant 0.010 cm
displayed.
is
4Confirm the selection with <OK>.
The meter switches to the measured value display.
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33
OperationLab 970
4.5Setting the temperature compensation TC
The calculation of the temperature compensation is based on the
preset reference temperature, Tref 20 or Tref 25 (see page 43).
You can select one of the following temperature compensations:
z Nonlinear temperature compensation "nLF"
according to DIN 38404 or EN 27 888
z Linear temperature compensation"Lin"
with adjustable coefficient in the range 0.001 ... 3.000 %
z No temperature compensation
Note
Select the following temperature compensations given in the table
according to the respective test sample:
/K
Application tips
Test sampleTemperature compensation TCDisplay
indicator
Natural water
(ground water,
surface water,
drinking water)
Ultrapure waternLF
Other aqueous
solutions
Salinity
(seawater)
nLF
according to DIN 38404
EN 27 888
according to DIN 38404
EN 27 888
Set linear temperature coefficient
0.001 ... 3.000 %/K
Automatically nLF according to
IOT
Sal,
34
ba75558e0311/2009
Lab 970Operation
c
T
F
L
N
4
8
6
S/cm
µ
Tref25
ARng
nLF
Selecting the nonlinear
temperature
compensation
1Press <CAL> repeatedly until tc is displayed.
2Confirm the selection with <OK> or <CAL_>.
The temperature compensation that was set last is displayed.
3Press <CAL> repeatedly until nLF is displayed.
ba75558e0311/2009
4Confirm the selection with <OK>.
The nonlinear temperature compensation is switched on.
The meter switches to the measured value display.
The selected temperature compensation appears as the status
display.
35
OperationLab 970
c
T
/K
%
0
20
0
1
4
2
2
S/cm
µ
Tref25
ARng
Lin
Selecting the linear
temperature
compensation
1Press <CAL> repeatedly until tc is displayed.
2Confirm the selection with <OK> or <CAL_>.
The temperature compensation that was set last is displayed.
3Press <CAL> repeatedly until the adjustable linear
temperature coefficient appears on the display.
36
4Set the temperature coefficient with <▲><▼>, e. g. 1.880 %/K.
ba75558e0311/2009
Lab 970Operation
c
T
5Confirm the selection with <OK>.
The linear temperature compensation is switched on.
The meter switches to the measured value display.
The selected temperature compensation appears as the status
display.
Switching off the
temperature
compensation
1Press <CAL> repeatedly until tc is displayed.
2Confirm the selection with <OK> or <CAL_>.
3Press <CAL> repeatedly until the following display appears.
ba75558e0311/2009
4Confirm the selection with <OK>.
The temperature compensation is switched off.
The meter switches to the measured value display.
37
OperationLab 970
4.6Downloading calibration data
You can download calibration data:
z to the display
z to the interface (see page 40)
Download to display via
calibration menu
While the calibration data is being displayed you can:
zpress <OK>to display further calibration data
(calibrated cell constant)
1Press <CAL_> to display the calibration data.
The calibration date and calibrated cell constant are displayed
consecutively for approx. 10 seconds each.
While the calibration data is being displayed you can:
zpress <OK>to display further calibration data
(calibrated cell constant)
zpress <CAL
_>to download the calibration data to the
interface
4.7Transmitting data
38
The meter has two interfaces:
z RS232 interface (serial port)
z USB interface (device)
Via both interfaces, you can transmit data to a PC and update the meter
software.
ba75558e0311/2009
Lab 970Operation
The meter is supplied with power via the USB interface.
The RS232 interface enables to transmit data to an external printer.
Note
The relevant interface cable has to be connected if you want to
download data to an interface (USB or RS232).
It is not possible to download data to both interfaces (USB and RS232)
at the same time. After connecting a meter to the USB socket the
RS232 interface is inactive. The RS232 interface is active if no meter is
connected to the USB interface.
CAUTION
The interfaces are not galvanically separated.
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
ba75558e0311/2009
39
OperationLab 970
4.7.1Options for data transmission
Via the USB interface you can transmit data to a PC. Via the RS 232
interface, you can transmit data to a PC or an external printer.
The following table shows which data are transmitted to the interface in
which way:
DataControlOperation / description
Current measured
values
calibration recordsmanualz During the display
4.7.2Automatically downloading measurement datasets at
intervals
In order to automatically download to the interface measured values at
certain time intervals, set the download interval (Int.2).
manualz With <OK>.
automatic, at
intervals
automaticz After each measurement
automaticz On completion of a
z With <SC
can set the transmission
interval (Int.2) (see
page 40).
with stability control.
indication with <CAL
(see page 38).
calibration procedure.
_>. Then you
_>
Setting the download
40
interval
The default setting for the download interval (Int.2) is OFF.
To switch the function on, set an interval (5 s, 10 s, 30 s, 1 min, 5 min,
10 min, 15 min, 30 min, 60 min):
1Press <SC_> to open the setting of the Int.2 interval.
2If necessary, set an interval with <▲><▼>.
3Close the setting with <OK>.
The download to the interface takes place at the specified
interval.
4.7.3RS232 interface
1Connect the interface to the PC or printer via the cable Z390
(PC) or Z393 (ext. printer).
ba75558e0311/2009
Lab 970Operation
RS 232
1
3
4
5
6
2
1 *
2 RxD
3 TxD
4 *
5 SGnd
6 CTS
*not used
2If necessary, disconnect a connected USB cable from the
meter.
3Set up the following transmission data on the PC/printer:
– Baud rate: selectable from 1200, 2400, 4800, 9600,
– Handshake: RTS/CTS + Xon/Xoff
PC only:
– Parity: none
– Data bits: 8
– Stop bits: 1
Socket assignment
(RS232)
Installation of the USB
driver on the PC
4.7.4USB interface (device)
Connect the interface to the PC via the supplied Z875 USB cable. The
data output automatically switches to USB. The RS232 interface is
deactivated.
System requirements of the PC for installation of the USB driver:
z PC with Pentium processor or higher with at least one free USB
connection and CD-ROM drive
z Windows 2000, XP, Vista.
1Insert the supplied installation CD in the CD drive of your PC.
2Install the USB driver on the PC.
Follow the Windows installation instructions as necessary.
3
The meter is listed as a virtual COM interface among the
connections in the Windows instrument manager.
4.7.5Operation with MultiLab pilot
ba75558e0311/2009
With the aid of the MultiLab pilot software, you can record and evaluate
measuring data with a PC. The data is transmitted after the meter is
connected to the RS232 serial interface or USB interface of a PC.
41
OperationLab 970
Note
More detailed information can be found in the MultiLab pilot software
operating manual.
42
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Lab 970Operation
4.8Settings
You can adapt the meter to your individual requirements. The settings
are done in the following menus:
z System settings (<OK
– Baud rate (Baud)
– Switch-off interval (tOff)
– Date (Day.Month)
– Date (Year)
–Time (Time)
z Calibration and measurement settings (<MODE
– Reference temperature (Tref25 or Tref20)
– Temperature unit (°C / °F)
– Cleaning interval (Int.C [0 ... 999])
Note
You can exit the setting menu at any time by pressing <MODE>.
Settings already modified and confirmed with <OK> are stored.
_>)
_>)
ba75558e0311/2009
43
OperationLab 970
0
40
8
Baud
0
00
1
f
f
O
Time
t
4.8.1System settings
The default setting is printed in bold.
Baud rate (Baud)1200, 2400, 4800, 9600
Switch-off interval (.OFF)10, 20, 30, 40, 50 min,
1, 2, 3, 4, 5, 10, 15, 20, 24 h
Date (Day.Month)Any
Date (Year)Any
Time (Time)Any
1Open the menu for system settings with <OK_>.
The first system setting is displayed.
Baud rate (Baud)
Switch-off interval
(.OFF)
2Set the required baud rate with <▲><▼> .
3Confirm with <OK>.
.OFF, the setting of the switch-off interval is displayed.
44
ba75558e0311/2009
Lab 970Operation
3
30
0
Day.Month
4Set the switch-off interval with <▲><▼>.
5Confirm with <OK>.
Day.Month, the setting of the date is displayed.
The day display flashes.
Date and time
6Set the date of the current day with <▲><▼> .
7Confirm with <OK>.
The month display flashes.
8Set the current month with <▲><▼> .
9Confirm with <OK>.
Year, the setting of the year is displayed.
10Set the year with <▲><▼> .
11Confirm with <OK>.
The setting of the time is displayed.
The hour display flashes.
12Set the current hour with <▲><▼> .
13Confirm with <OK>.
The minute display flashes.
14Set the current minute with <▲><▼> .
15Confirm with <OK>.
The system settings are completed.
The meter switches to the measuring mode.
ba75558e0311/2009
45
OperationLab 970
5
2
T
Tref25
4.8.2Measurement settings
These settings apply to the determination of the cell constant and
measurement (the default condition is printed in bold).
Reference temperaturet25, t20
Temperature unit (UnI)°C, °F
Cleaning interval (Int.C) 0 ... 180 ... 999 d
Reference temperature
1Open the menu for measurement settings with <MODE_>.
t25, the adjusted reference temperature is displayed.
Temperature unit (Uni)
46
2Select the reference temperature with <▲><▼> .
3Confirm with <OK>.
Uni, the setting of the unit of the temperature value is
displayed.
ba75558e0311/2009
Lab 970Operation
4Using <▲><▼>, toggle between °C and °F.
5Confirm with <OK>.
Int.C, the setting of the cleaning interval is displayed.
Cleaning interval (Int.C)
6Set the interval with <▲><▼>.
7Confirm with <OK>.
The measurement settings are completed.
The meter switches to the measuring mode.
ba75558e0311/2009
47
OperationLab 970
0
5
2
T
N
I
4.8.3Interval for automatic data transmission
The interval for automatic data transmission serves to transmit the
current measurement dataset to the interface at the specified interval.
Data transmission
interval
Data transmission interval
(Int.2)
1Press <SC_> to open the setting for the transmission interval.
Int.2, the setting of the transmission interval is displayed.
The setting of the interval for the data transmission to the
interface is completed.
The meter switches to the measuring mode.
48
ba75558e0311/2009
Lab 970Operation
o
n
C
i
n
I
4.9Reset
4.9.1Resetting the cell constant
This function serves to erase the last determined cell constant.
Subsequently, the meter uses the last manually adjusted cell constant.
All other meter settings are retained.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
Resetting the cell
constant
1Press <On/Off_> to open the menu for the reset of the cell
constant.
Ini.C is displayed.
2Press <▲><▼> to display no or YES.
YES: Reset the cell constant.
no: Retain the cell constant.
3Confirm with <OK>.
The menu is finished.
The meter switches to the measuring mode.
ba75558e0311/2009
49
OperationLab 970
o
n
t
i
n
I
4.9.2Resetting meter settings
This function resets to the default condition meter settings. The
relevant values are given on the following pages:
System settingspage 44
Measurement settingspage 46
The following settings are also reset to the default condition:
SettingDefault settings
Resetting the meter
settings
Measured variable
Adjusted cell constant0,650 1/cm
Temperature compensationnLF
Temperature coefficient of the
linear temperature
compensation
TDS factor1.00
1Switch on the meter with <On/Off>.
The display test appears briefly on the display.
2During the display test, press <MODE> to open the menu for
the reset of the meter settings.
Init is displayed.
ӕ mS/cm or µS/cm
2.000 %/K
50
3Press <▲><▼> to display no or YES.
YES: Reset the meter settings.
no: Retain the meter settings.
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Lab 970Operation
4Confirm with <OK>.
The menu is finished.
The meter switches to the measuring mode.
Note
The measuring system is possibly not calibrated after a reset. Before
measuring, make sure the meter uses the cell constant suitable for the
measuring cell.
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51
OperationLab 970
52
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Lab 970Maintenance, cleaning, disposal
1
5Maintenance, cleaning, disposal
5.1Maintenance
The only maintenance activity required is replacing the batteries.
Note
See the relevant operating manuals of the measuring cells for
instructions on maintenance.
5.1.1Replacing the batteries
1Open the battery compartment (1) on the underside of the
meter.
2Remove the four batteries from the battery compartment.
3Place four new batteries (type Mignon AA) in the battery
compartment.
4Close the battery compartment (1).
The date (day) flashes on the display.
5Set the date and time according to page 44.
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CAUTION
Make sure that the poles of the batteries are the right way round.
The
±signs on the batteries must correspond to the ± signs in the
battery compartment.
Only use leakproof alkaline manganese batteries.
53
Maintenance, cleaning, disposalLab 970
5.2Cleaning
Occasionally wipe the outside of the meter with a damp, lint-free cloth.
Disinfect the housing with isopropanol as required.
CAUTION
The housing is made of synthetic material (ABS). Thus, avoid
contact with acetone or similar detergents that contain solvents.
Remove any splashes immediately.
5.3Packing
This meter is sent out in a protective transport packing.
We recommend: Keep the packing material. The original packing
protects the instrument against damage during transport.
5.4Disposal
BatteriesThis note refers to the battery regulation that applies in the Federal
Republic of Germany. We would ask end-consumers in other countries
to follow their local statutory provisions.
Note
This instrument contains batteries. Batteries that have been removed
must only be disposed of at the recycling facility set up for this purpose
or via the retail outlet.
It is illegal to dispose of them as household refuse.
54
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Lab 970What to do if...
6What to do if...
Error message
E1
Error message,
E3
Display of Cln
Display,
LoBat
CauseRemedy
– Measured value outside the
measuring range
CauseRemedy
– Measuring cell contaminated– Clean cell and replace it if
– Unsuitable calibration
solution
CauseRemedy
– Cleaning interval expired– Recalibrate the measuring
CauseRemedy
– Batteries almost empty– Replace the batteries (see
– Use suitable measuring cell
necessary
– Check calibration solutions
system
page 53)
Display
Instrument does not
react to keystroke
ba75558e0311/2009
to
CauseRemedy
– Time-out of the interface– Check the instrument that is
connected
CauseRemedy
– Operating condition undefined
or EMC load unallowed
– Processor reset:
Press and hold the <SC>
key and switch the meter on
55
What to do if...Lab 970
You want to know which
CauseRemedy
software
version is in the
instrument
– E. g., a question by the service
department
– Switch on the meter.
During the display test,
display the software version
with <OK>.
56
ba75558e0311/2009
Lab 970Technical data
Stand October 30, 2009Translation of the legally binding German version
7Technical data
7.1General data
Dimensionsapprox. 240 x 190 x 80 mm
Weightapprox. 1.0 kg (without power pack, without stand)
Mechanical structureType of protectionIP 43
Electrical safetyProtective classIII
Test certificatescETLus
Ambient
conditions
Power
supply
USB interfaceAutomatic switch-over when a USB cable is connected.
Storage- 25 °C ... + 65 °C
Operation0 °C ... + 55 °C
Climatic class2
Batteries4 x 1.5 V alkali-manganese batteries, Type
AA
Operational lifeApprox. 500 operating hours
Power pack
(charging device)
TypeUSB 1.1 (device)
FRIWO FW7555M/09, 15.1432.500-00
Friwo Part. No. 1883259
Input: 100 ... 240 V ~ / 50 ... 60 Hz / 400 mA
Output: 9 V = / 1.5 A
Connection max. overvoltage category II
Primary plugs contained in the scope of
delivery: Euro, US, UK and Australian.
ba75558e0311/2009
57
Technical dataLab 970
FCC Class A Equipment Statement
Note: This equipment has been tested and found to comply with
the limits for a Class A digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is
operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual,
may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to
correct the interference at his own expense.
Any changes or modifications not expressly approved by the
party responsible for compliance could void the user's authority
to operate the equipment.
Stand October 30, 2009Translation of the legally binding German version
Guidelines
and norms used
EMCEC guideline 2004/108/EC
EN 61326-1 Class B
FCC Class A
Instrument safetyEC guideline 2006/95/EC
EN 61010-1
ANSI/UL 61010-1
CAN/CSA-C22.2 No. 61010-1
Radio data
transmission
EC guideline 1999/5/EC
EN 300 330-2
EN 50364
EN 60950-1
Climatic classVDI/VDE 3540
IP protection classEN 60529
58
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Lab 970Technical data
Stand October 30, 2009Translation of the legally binding German version
7.2Measuring ranges, resolution, accuracy
Measuring ranges,
resolution
VariableMeasuring rangeResolution
ӕ [µS/cm]0.000 ... 1.999*
0.00 ... 19.99**
0.0 ... 199.9
0 ... 1999
ӕ [mS/cm]0.00 ... 19.99
0.0 ... 199.9
0 ... 500
Resistivity
[MOhm*cm]
SAL0.0 ... 70.0
0.00 ... 19.99
0.0 ... 199.9
0 ... 1999
0.001
0.01
0.1
1
0.01
0.1
1
0.01
0.1
1
0.1
according to the IOT
table
TDS [mg/l]0 ... 1999
1
Factor can be set
between 0.40 and
1.00
T [°C]− 5.0 ... + 120.00.1
T [°F]+ 23.0 ... + 248.00.1
* only possible with cells of the cell constant, 0.010 cm
** only possible with cells of the cell constant, 0.010 cm-1 or 0.090 ... 0.110 cm
Cell constantsCell constant CValues
Can be calibrated in
the ranges
Adjustable0.250 ... 2.500 cm
Reference temperatureReference
temperature
Adjustable20 °C (Tr20)
0.450 ... 0.500 cm
0.585 ... 0.715 cm
0.800 ... 1.200 cm
0.090 ... 0.110 cm
0.010 cm-1 (fixed)
Values
25 °C (Tr25)
-1
-1
-1
-1
-1
-1
-1
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59
Technical dataLab 970
Stand October 30, 2009Translation of the legally binding German version
Accuracy (± 1 digit)VariableAccuracyTemperature of the test
sample
ӕ/ Temperature compensation
None (Off)± 0.5 %
Nonlinear (nLF)± 0.5 %0 °C ... + 35 °C
according to EN 27 888
± 0.5 %+ 35 °C ... + 50 °C
Extended nLF function
according to WTW
measurements
Linear (lin)± 0.5 %+ 10 °C ... + 75 °C
SAL / range
0.0 ... 42.0± 0.1+ 5 °C ... + 25 °C
± 0.2+ 25 °C ... + 30 °C
TDS [mg/l]
± 1
T [°C] / temperature sensor
NTC 30± 0.1
PT 1000± 0.3
Note
The accuracy values specified here apply exclusively to the meter. The
accuracy of the measuring cell also has to be taken into account.
60
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Lab 970Lists
8Lists
This chapter provides additional information and orientation aids.
AbbreviationsThe list of abbreviations explains abbreviations that appear on the
display or when dealing with the instrument.
Specialist termsThe glossary briefly explains the meaning of the specialist terms.
However, terms that should already be familiar to the target group are
not described here.
IndexThe index helps you to find the topics that you are looking for.
ba75558e0311/2009
61
ListsLab 970
Abbreviations
Conductivity value
°CTemperature unit °Celsius
°FTemperature unit, °Fahrenheit
ARAutoRead
An AutoRead measurement is carried out for
stability control (SC).
ARngAutomatic range switch-over: meter measures with
highest possible resolution
AutoStoreAutomatic storage in memory
BaudBaud rate
CCell constant cm
-1
CalThe measuring system is being calibrated or works
with a calibrated cell constant.
CELL Cell constant
dispDisplay
Data memory is displayed
E1Overflow
Display range exceeded
E3Error message
CHAPTER 6 WHATTODOIF... (PAGE 55)
see
IdentID number
InIInitialization
Resets individual basic functions to the status they
had on delivery
IntInterval
IOTInternational Oceanographic Tables
LinLinear temperature compensation
LoBatLow Battery
Batteries are almost empty
62
nLFNonlinear temperature compensation
SALSalinity
SCStability control (drift control)
SELVSafety Extra Low Voltage
ba75558e0311/2009
Lab 970Lists
Sto CIrClearing the memory
Sto dispDownload data memory to display
Sto FullMemory location occupied
Sto PrtDownload data memory to printer/interface
TautoAutomatic temperature measurement
TCTemperature coefficient
TDSTotal dissolved solids
TPTemperature Probe;
Temperature measurement active
Tref 20/T20Reference temperature 20 °C
Tref 25/T25Reference temperature of 25 °C
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63
ListsLab 970
Glossary
AdjustingTo manipulate a measuring system so that the relevant value (e. g. the
displayed value) differs as little as possible from the correct value or
a value that is regarded as correct, or that the difference remains
within the tolerance.
AutoRangeName of the automatic selection of the measuring range.
CalibrationComparing the value from a measuring system (e. g. the displayed
value) to the correct value or a value that is regarded as correct.
Often, this expression is also used when the measuring system is
adjusted at the same time (see adjusting).
Cell constant, kCharacteristic quantity of a conductivity measuring cell, depending on
the geometry.
ConductivityShort form of the expression, specific electrical conductivity.
It corresponds to the reciprocal value of the resistivity.
It is a measured value of the ability of a substance to conduct an
electric current. In water analysis, the electrical conductivity is a
dimension for the ionized substances in a solution.
Measured valueThe measured value is the special value of a measured parameter to
be determined. It is given as a combination of the numerical value and
unit (e. g. 3 m; 0.5 s; 5.2 A; 373.15 K).
Measured variableThe measured parameter is the physical dimension determined by
measuring, e. g. pH, conductivity or DO concentration.
MolalityMolality is the quantity (in Mol) of a dissolved substance in 1000 g
solvent.
Reference
temperature
Fixed temperature value to compare temperature-dependent
measured values. For conductivity measurements, the measured
value is converted to a conductivity value at a reference temperature
of 20 °C or 25 °C.
ResetRestoring the original condition of all settings of a measuring system.
ResistanceShort name for the electrolytic resistivity. It corresponds to the
reciprocal value of the electrical conductivity.
ResolutionSmallest difference between two measured values that can be
displayed by a measuring instrument.
SalinityThe absolute salinity S
of seawater corresponds to the relationship
A
of the mass of dissolved salts to the mass of the solution (in g/Kg). In
practice, this dimension cannot be measured directly. Therefore, the
practical salinity according to IOT is used for oceanographic
monitoring. It is determined by measuring the electrical conductivity.
64
Salt contentGeneral designation for the quantity of salt dissolved in water.
Stability controlFunction to control the measured value stability.
ba75558e0311/2009
Lab 970Lists
α
T
Ref
=
Meas
*
1
1+
a
(T -)
*
T
Ref
Standard solutionThe standard solution is a solution where the measured value is
known by definition. It is used to calibrate a measuring system.
Value of the slope of a linear temperature function.
coefficient
Temperature
compensation
Name of a function that considers the temperature influence on the
measurement and converts it accordingly. Depending on the
measured parameter to be determined, the temperature
compensation functions in different ways. For conductimetric
measurements, the measured value is converted to a defined
reference temperature. For potentiometric measurements, the slope
value is adjusted to the temperature of the test sample but the
measured value is not converted.
Temperature functionName of a mathematical function expressing the temperature
behavior of a test sample, a sensor or part of a sensor.
Test sampleDesignation of the test sample ready to be measured. Normally, a test
sample is made by processing the original sample. The test sample
and original sample are identical if the test sample was not processed.
Program startStart the "Update_Labxxx_MxxxP" program from the Windows start
menu. The selected interface is displayed on the left side of the status
bar at the lower edge of the window.
You can change the language via the language menu.
Firmware updateProceed as follows:
1Using the Z390 interface cable, connect the Lab 970 to the
serial interface (COM port) of the PC.
2Make sure the Lab 970 is switched on.
3To start the update process click the OK button.
The program automatically recognizes the used interface.
4To go on, follow the instruction of the program.
During the programming process, a corresponding message
and a progress bar (in %) appear.
The programming process takes approx. two minutes.
A terminatory message is displayed after a successful
programming process. The firmware update is now completed.
5Disconnect the meter from the PC.
The instrument is ready for operation.
After switching the meter off and on you can check whether the meter
has taken over the new software version (see page 56).